What makes you think the caller ID you see on your display is owned by the person calling you? Most spam calls I get are neighborhood spoofing. I find most spam to be scam and scammers don't use numbers belonging to them. Are you looking for the owner of the number or the person calling you as they are most likely different things. Unless you know someone work that works for the provider's network that is willing to do illegal traps for you that you can't use to sue someone, the only legal solution you have the info obtained by law enforcement. There is literally no real way of knowing anything about the call without the carrier providing CDR (call detail record) and SIP message traps to identify the source IP of the voip call.
What makes you think the caller ID you see on your display is owned by the person calling you? Most spam calls I get are neighborhood spoofing. I find most spam to be scam and scammers don't use numbers belonging to them. Are you looking for the owner of the number or the person calling you as they are most likely different things. Unless you know someone work that works for the provider's network that is willing to do illegal traps for you that you can't use to sue someone, the only legal solution you have the info obtained by law enforcement. There is literally no real way of knowing anything about the call without the carrier providing CDR (call detail record) and SIP message traps to identify the source IP of the voip call.